example list for online tasks
adding Document Structure Roles
added HTML_Codesniffer to general tools list
Merge branch 'gh-pages'
Merge branch 'gh-pages'
fixed typos
added disability stats
bullets, duh.
Merge branch 'gh-pages'
added note about captions
tweaking how to list
fixed keyboard-only goof
Update a11y-presentation.md
note on keyboard shortcuts
tidied link example
cleaned up HTML5 img tag
made "images" section more all encompassing
label examples
bolding VO command
clarified aria-labelledby example